Given the way the mobs are constantly moving about in thornmarch, I'd be a little more understanding of a monk messing up rotation for whatever excuse they give, especially on the first try. There is other information that should have been taken into account as well, such as the level or skill of the other dps in the group. If they were bards or mages, they wouldn't have to worry as much about rotations getting messed up due to movement, etc. so they would have gotten more hits in, which would skew the results of percentages of total damage done.

tl;dr

The first try of a single fight isn't nearly enough data to justify losing your cool and insulting someone over. This give credence to the idea that parsers can be used to harass people (misuse by people to blame/call someone out for a loss).